Other names for the additive (synonyms)
General Information
Food additive E501(ii) is a subtype of the additive E501 and is known as potassium bicarbonate.
Additive E501(ii) is an acidic potassium salt of carbonic acid with the chemical formula KHCO3. It has mild alkaline properties, dissolves well in water, and forms a slightly alkaline solution.
Potassium bicarbonate is obtained by partial carbonation of potassium hydroxide (KOH) or by saturating a potassium carbonate (K2CO3) solution with carbon dioxide (CO2) under controlled conditions (excess CO2 and low temperature).
Unlike potassium carbonate E501(i), additive E501(ii) has milder alkaline properties, higher stability in dry form, and the ability to release carbon dioxide when heated, making it an effective leavening agent.
In the food industry, E501(ii) is used in the production of bakery and confectionery products as a leavening agent, as well as a pH regulator in beverages and other products where a more delicate pH adjustment is required.
For more details on the properties of potassium salts, their effects on the human body, and references to scientific studies, see the material on the food additive E501.